Easy, affordable room analysis

Does an app exist for I Phone/Pad that is a decent room spectrum analyzer? I have tweeked my room
with various diffusers and absorbers but still have an annoying mid bass hump. I thought the best place to start would be to truly define the culprit frequencies. Would hate to buy traps that work in
lower frequencies only to realize the problem is somewhere else.

You bet.

It’s called Audio Tools by Studio Six Digital. The basic suite of applications is something like $20 on the Apple App Store. The basic package has a ridiculous number of useful tools you can check out here: https://studiosixdigital.com/

To your specific question, the basic tool set includes a Fast Fourier Transfer (FFT) module that produces an interactive display:

And an RTA module:

The app runs on iPhone and iPad. If you download to one of these devices, it will synch to the other.

These screen grabs are not of my room - just examples I took while sitting at my desk.

To go further, Room EQ Wizard is a free (well, shareware) software package that will show you decay times vs frequency via waterfall plots. While the download is free (I run it on a Windows 10 laptop), you will need a calibrated usb mic. I picked one up from Dayton Audio for ~$100.

AudioTools and especially REW allowed me to take system performance to new levels of sonic bilss.

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What software/hardware combination have you used so far to implement your treatments?
One of the most widely used is ; REW/Windows/USB calibrated microphone/interface for Microphone/Laptop.
Not ithingies but a combo that many are familiar with, cheap enough (REW is free), USB mike is between USD 75-150. Focusrite Scarlett 2i2 is a good interface.

A quick search on iOS apps revealed a number. But you’d need to learn their strengths / weaknesses, how sensitive (or not) the ithings hardware is.

Thank you for your input and comments. This app
looks better that ones I have seen and I appreciate that you have given it a test drive. I will give it a spin.

Thanks for the response. I have not used a scientific method to tune my room but have placed art, cd,s, curtains, etc. to get a reasonably stable sound in the mids and highs but the longer waves
are standing and bothering. I will check out some sites and share my findings. Thanks again for you tips.

You could try a free website solution: amcoustics.com. You’ll see on the front page the room mode calculator. You measure the dimensions of your room HxWxD and it shows the room modes frequencies. It works on a computer better than an iPad. You can slide up the scale, hear the tones, see the modes etc.

Thanks. Looks like a good site.